Wheat-scouring machine.



2 m g r a M d e t n. e t a P WHEAT SCDURING MACHINE. (Application filed Mar- 15, 1901.)

2 Sheets-$heet I.

(No Model.)

No. 695,|06. Patented Mar. II, 11902.

G. LUTZENBURGER.

WHEAT SCOURING MACHINE.

Applicaticn filed Mar. 15, 1901.] (No Model.) 2 Sheets-Sheet 2.

$53855.- /NVE W My 2% 4d? 7 Jim/(E73 m: NORRIS PETERS cc. mom-uwa, WASHINGTON, n. c.

name

PATENT rrro.

GEORG LUTZENBURGER, OF SOHLAUERSBACH, GERMANY.

WHEAT-SCOURING MACHINE.

SPECIFICATION forming part of Letters Patent No. 695,106, dated March 11, 190'2.

Application filed March 15,1901. Serial No. 51,282. (No model.)

To all whom it may concern:

Be it known that I, GEORG Liirznnnunenn,

a subject of the German Emperor, residing at Schlauersbach, Bavaria, Germany, have invented certain new and useful Improvements in Wheat-Scouring Machines, of which the following is a specification.

The object of the invention is to provide an improved form of machine for sim ultaneously scouring and husking or decorticating the wheat-grains.

The chief feature of this improved machine consists in that a large number of similar conical trays which are mounted vertically one above another on avertical spindle work against a similar number of stationary conical trays situated between them. The rotary conical trays are provided with rubbing or striking bars on their upper conical surfaces which work against suitable scrapingsurfaces on the fixed trays, and thus remove the points or fuzz ends from the grains of wheat and loosen the husks. The under sides of the rotating trays, on the other hand, carry brushing devices, facing which there are emery-cloth surfaces on the fixed trays and which are so arranged that the grains thrown to the outside by the striking-bars by centrifugal force are again drawn toward the center and fed to the next partition or tray, a removal of the already-loosened shells or skins and a Vigorous brushing and polishing of the grains of wheat being simultaneously eifected. As the grains of wheat in this manner pass stepwise from one floor or tray to another all the processes of working hereinbefore mentioned are repeated on the said grains in alternate succession as often as there are rotating or fixed trays present, the removal of the points and the scouring taking place more particularly in the upper elements, and in addition to the brushing the polishing of the wheat-grains is effected in the lower elements, until finally the wheatgrains leave the machine in a thoroughlycleanedcondition.

This improved wheat-cleaning machine is shown in vertical section in Figure I of the accompanying drawings, two of the permanent elements e being shown at the right side of Fig. I in plan,while all the other elements 6, both at the right and left sides, are shown in section, while Fig. II is a plan view of one of the rotary trays by itself; Fig. III, a section thereof; Fig. IV, a view from beneath, and Fig. V is an enlarged detail view.

The trays a, which are vertically mounted one above the other on a revolving shaft b, consist of dish-shaped bodies, the upper sides of which consist of dished surfaces 0 and their under sides of conical surfaces cl. Between each two adjacent trays a there is a fixed tray 6, which consists of an annular solid body of triangular section, the conical edgesfand g of which stand in close proximity to those of the revolving trays. The parts (2, which have cylindrical sides, are built up on one another in the form of a tower, the cylindrical bodies thereby resulting being inclosed by an outer wall h. The grain introduced through a feed-hopper '2 at the upper end of the machine falls onto the hollow cone surface 0 of the uppermost tray a, which, as shown in Fig. II, is provided with striking-bars 7t, running obliquely from the center to the periphery, and in consequence of its rotation the grain is driven outwardly in the direction of rotation. The cone surfaces g, lying opposite the dished surfaces 0 and forming part of the fixed trays,are formed of perforated rasping sheet metal, by which the grain thrown upward by the sloping surfaces of the striking-bars is subjected to a great friction. By this means the grains while still in the first partition lose first their points, while in the succeeding partitionsbetween said surfaces 0 and g a loosening, or rather a cracking off, of the shells or husks takes place. The grain having reached the outer periphery of the tray a then falls over the outer edge of the same downward onto the conical surfaces J of the succeeding fixed tray 6, which surface is coated with emerycloth. The under sides cl of the revolving trays which work against these emery-cloth surfaces carry brushes Z, which extend in a curve from the outside to the center in the manner shown in Fig. 4E and feed the grain inwardly in the opposite direction to the centrifugal force. Between the brushes and the emery surfaces the wheat is thus thoroughly rubbed, so that in the upper compartments the dirt and also the already-loosened husks are removed from the grains,while under the continuous treatment in the lower compartments and between the said surfaces at andf a polishing of the wheat takes place in addition to the brushing. The wheat thrown toward the center by the brushes falls on the tray situated beneath and in this manner passes from one tray to the other, while by the alternate treatment on the rasping and emery surfaces the grains are subjectedto a step-by-step purification or treatment and finally leave the lowesttray in a thoroughly cleaned and purified condition through the discharge-pipe m.

ported on a leverp and may be adjusted ver- 7 tically within moderate limits by turning a the distance between the working surfaces to be exactly adjusted.

I declare that what I claim is-- In a wheat scouring and husking or decorticating machine the combination of a plurality of alternate fixed and rotating trays, striking-bars 70 mounted obliquely upon the upper surfaces of said rotating trays a curved brushes Z upon the under side of said rotating trays, rasping-surfaces g forming the under side of said fixed trays e, and emery surfaces f upon the upper side of said fixed trays substantially as and for the purpose set forth.

In witness whereof I have hereunto set my Witnesses:

ANDREAS STIoH, OSCAR BooK. 

